Bob
I was recently given a broken laptop as the previous owner said it no longer worked. It is a cheapo from Wal-Mart so I figured it was just something I would strip for parts and junk the rest. The unit is a Gateway ne56r31u with a Celeron B830 and the HM70 Chipset. Well I assumed it would be junk but the unit was actually pretty clean without soda and cigarette smoke which seems to have been the norm for me lately. It powered right up and went to a screen where it appears to have been locked by a virus. I wiped the OS and the unit now works like a champ so it was a simple fix.
It looks like this is a Sandy Bridge (2nd gen) CPU installed in an Ivy Bridge (3rd gen) chipset motherboard. Intel and other sites don't even officially show the B830 as supported by the chipset but it obviously is. I have seen the same in earlier Core 2 Duo machines and such too.
Most HM70 units I have come across have a BGA soldered on CPU and are non-upgradeable. This one is s standard socket so opens up some SLIGHT upgrade possibilities.
Further research revealed there there is nothing stopping a person from installing a full blown Core i-series CPU as long as it is 35W or less. The problem is that Intel has introduced an artificial limitation to handicap the unit by making it turn off after 30 minutes like clockwork. It is a hard shutdown like when a system overheats. People who have done this have monitored temps which were fine and always find it turns off at 30 minutes to the second.
Is there a way to make this chipset support anything more than a Celeron or Pentium Dual Core as that is what it is limited to? Any BIOS hacks or similar? I hear this limitation is very low level and integral to the southbridge and is much harder to get around than some of these limits in the past.
I figure there are risks to bricking a perfectly good unit and I couldn't find anything about unlocking this anywhere so I have gone ahead and ordered a Pentium Dual Core 2030M which is the highest CPU supported by the chipset for $25 on eBay. I have already flashed the BIOS to the latest version. Besides not having quite as good of onboard video, this CPU actually outdoes some of the early Core i3 units so I don't think it will be too bad.

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